Miner&#39;s drill.



MIEIEES DRILL. APELIOATIOE? FILED mm 20, 1912.

Paiiammi J1me noesos.

TE'TW Q T FTT V7 77 to Jiitlhih @irsiilhis it .e

SAMUEL 1. SKEEN, f ll SANDQVAL, ZLLIHOES.

Minnie/s :osinn.

Application filed June so, 3.912.

To all whom it may concern Be it known that I, SAMUEL T. SKEEN, u citizen of the United States of America, residing at Sandoval, in the county of Marion and State of Illinois, have invented certain new and useful Improvements in Miners Drills, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a port of this specification.

My invention relates to a drill purticir larly adapted for use in drilling into coal deposits, end-has for its object the. production of a drill having detachable cutter blades which may be. very easily removed from or attfohed to the auger stern of the drill. The blades are pivoted to o cutter head at the end of the auger stein so as to swing toward each other when. the drill is being withdrawn from the hole and automatically assume an extended position, and be positively locked in such position while the drill is in service. As the pivoted blades are locked in an extended position, they cannot swing toward each other in boring through mother coal or other soft substances.

The ordinary coal drill will very frequently become wedged in the hole losing drilled by strikingsulfur, or other material encountered, which causes the drill to be diverted laterally, thereby binding the drill tightly in the hole so that considerable labor is required to withdraw the drill. The pivoted blades of my improved drill will readily collapse or swing toward each other during the withdrawal of the drill, and can always be very easily withdrawn from the hole.

In drilling a hole with an ordinary drill, a tapered hole is produced by reason or" the drill bit being worn down during the drilling operation. A. hole so formed is very 'diiiicult to temp, as the tsmping material will wedge in the hole, and air spaces will be present back of the tsmped material. lily drill is so constructed as to drill a hole in which false tsmping may be avoided, inasmuch as it permits the use of e pair of old blades having their points worn away to drill. the first port of the hole, end epsir of Specification of Letters Eatent.

Serial No. "104,211.

new blades in drilling-the remainder of the hole. It will be understood that the new blodes ere swung toward other so they will pass freely through. the outer portion of the hole, and when the blades reach the end of the hole, the drill may be operated with the result of automatically extending the blades and locking them in their extended positions.

Figure l is a side elevation, in section, of 0. portion of a drill embodyin the features of my invention. Fig. ll is :1 'iew similar to Fig. 1., showing the blades extended. Fig. H1 is a. section telzen epproxi nmtely on the line Ill-Ill, Fig. i. Fig. IV is a section taken approximately on the line lVIV, Fig. lll. Fig. V is e sect-ion taken on the line /'V, Ill.

in theeccompanying drawings: A designates a drill stern in the form of a spiral convoyer or worm having its end 1 flattened to fit into a slotted thrust rod 2. The stem A. is inter]. shed with and riveted to the thrust rod 2, and the letter is preferably provided with short wings elder-hung a continuation of the spiral conveyer. The end portion 4: of the thrust rod is arranged within and slidebly fitted to at cutter holder I8. Zthe cutter holder has oppositely disposed teens-- verse slots 5 for the reception of a pin on the thrust rod, wherehy said ports con.- nected. Blades Y are arranged between jaws 9 and pivotelly and detechahly connected thereto by a. screw 10, which serves to hold the jaws from spreading.

The blades '2 may be swung t the position seen in Fig. I to allow the drill to be inserted into a. hole, and when the blades reach the end of the hole, the drill may be operated, with the result of moving the blades to the position seen in Fig. ll". V5 hen the drill is rotated withthe inclined cutting edges engaging the material to be drilled, the hledes will automatically move to the position seen in Fig. II, and at this time, the pin 6 will ride along cam wells 12, at the rear of the slots 5, end finally lie in the ends oi": said slots beyond thecem faces on'the wells 3.2. The rotation of the drill senses the pin 6 to be i the oxide elf slots rear cam wall 12.

5, as seen in Fig. ll, end of one thrusi; rod Will therefor-s los? egslnse ills fiat rear faces 13 of the ho positively hold tended positions To yreven'b blades '7 1 mm s'" ns'ing to their extended positions While drill being inserted into lo at lease one of iille eutlzer lslesde so as lot-eel in their Joledes is preferably shown at 14,

The inclined cussing" edsps oi the blades 7 extend'll'rom points in from; or the cutter holder to points some distance reorwsfsdl of the front end of said o 3 therefore be understood the out in terial is deflected by the blades to poi t some distence book the frontend of no antler holder, it W11 we noted thee we blades are also oilset to provide inclines for deflecfing the out nm'terisl away from their cutting edges. This arrangement of the blades prevents the cutter holder from beeo-ming clogged will). owmateriel lying in front oi": it.

The jaws 9 of the cutter holder have rear beveled faces 17, (Fig. Ill), located Within she thrust rod. bore its forward end. The object in forming this beveled face is to en able the "thrust rod l to force outbetween the blades '5 and the jaws any material tending to prevent said rod from moving to its sea against the fin utoned rem: edges of the blades.

The flattened end 1 of the stern of my drill is connecied to the thrush rod 2 by e riveb, as sl own, and to hold. the thrustrod from pivotal movement, said flattened end is pro vidod with :1 tongue, (see doll/ed lines lligs. l and ll} that seats in a suitable recess in the rear end of the thrust rod.

An important advantage in my drill is that the drill blades being detachable from the drill stem, they may be removed and replaced. by other blades Whenever necessary. Without ilie necessity of raising the drill stems from s mine to sharpen choir bile, as: is ordinarily done, and single drill stern may be used for years, owin to there being a 1 practically no Wear thereon, the being" received o the desaoliable blades.

leer and i will.

I claim:

1. A miners drill oonn'arisinp; a stem, s

rustmeznber oi; the end of said stem, 2

holder rotatable on said thrustmerober. the said holder bovine: inclined cams emeneing diagonally iZllBYQOf relative to the the holder, and said thrush member axis of the holder, and said thrust member being provided with elements operable in said slots, and blades pivoted to said holder, seid blades having fist faces adapted to be engaged by the end of said threes member A minefs drill comprising a stem, a lhrustrod st the on of said seem, a, blade holder slidsblv filled to said thrust rod, said blade holder liming s slot provided with e corn Well, is pin on said thrust rod extending d slot and olsdes pivoted to said i ssidliledes having a, be engaged by said flat; fees adapted to thrust rod.

A miners drill. comprising stem, s thrust 3. at else of ssid seem, 2. blade holder slidsbl fitted said thrust rod, 3 id blade holder liming e slot provided with is com wall s pin on ll Hus; rod extending into said slot and adapted ride along said coin Well to 3 point beyond end of its cam face, and blades pivozed so blade holder, each of said bis-dos lisvi {5 as fees adopted to be firmly engaged by the end of said thrust when said pin is located beyond said osm face.

5. A miners drilloomprisfor e elem, a, thrnss member are the end of ssid stern, a blade holder having a, slot and pin. connecoion with said thrust member; and blades pivoted to said holder said blades being positioned. to be engaged by said thrust one of said pivoted blades having on ofi'set portion adapted to frictionelly engage said blade holder ior ilie purpose described.

6. A drill oompridng a stern, elirust rod at the end of said stom 2 blade holder lies oore e0 isoilitel e discharge of sulast-snoe member during the operation of the drill; I

ing s oore in which said thrust rod is slid tending diagonally thereof relative to the from said bore between said jaws and Of the end of said holder and each of said blades. blades being ofiset to provide inclines for 10 7. A miners drill comprising a stem, :1 deflecting the cut materialaway from the blade holder at the end of said stem, and .cuttingedges of the blades.

5 blades pivoted to said blade holder, each of SAMUEL T. SKEEN.

said blades having an inclined cutting edge In the presence ofextending from a point in front of the blade DAVE Roenns, holder to a point some distance'rearwardly Ann SHERMAN. 

